Photo Credit: Purpose To learn about sources of high-energy radiation and calculate student exposure to ionizing radiation over the past year.
Context This lesson was developed by the Challenger Center as part of NASA's MESSENGER Mission, of which Science Net Links is a partner.
Discover how to create new mountains, volcanoes, or oceans!
An evolutionary view of human origins underlies the World Heritage listing of the Lake Mungo site.
Such a view was not good for the first Australians.
Possible other sources of correlation Anomalies of radiometric dating Why a low anomaly percentage is meaningless The biostrategraphic limits issue Preponderance of K-Ar dating Excuses for anomalies Need for a double-blind test Possible changes in the decay rate Isochrons Atlantic sea floor dating Dating Meteorites Conclusion Gentry's radiohaloes in coalified wood Carbon 14 dating Tree ring chronologies Coral dating Varves Growth of coral reefs Evidence for catastrophe in the geologic column Rates of erosion Reliability of creationist sources Radiometric dating methods estimate the age of rocks using calculations based on the decay rates of radioactive elements such as uranium, strontium, and potassium.
On the surface, radiometric dating methods appear to give powerful support to the statement that life has existed on the earth for hundreds of millions, even billions, of years.